Hello @Jeje Welcome to the Community Board!
I think what you mean is using multiple futures trading accounts with the Rithmic API.
You have several options to implement it:
You can open multiple futures trading accounts, deposit funds in each, and then receive a unique user ID for each account to operate your method with the Rithmic API.
The second option is to have a Control/Block Account where you place your funds, and at the same time, all the other accounts where you are running your strategies would be crossed-margined to the main trading account.
The last option is to have one account and run multiple strategies, but you will have to keep the performance of each strategy.
Please let us know if this helps you with your APIs inquiry.